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seraphim [82]
3 years ago
14

why did mendeleev leave blank spaces on his periodic table? did later discoveries justify his predictions?

Chemistry
1 answer:
schepotkina [342]3 years ago
7 0

Answer:

mendeleev left a space

Explanation:

so the periodic table can be organize

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Which type of chemical bond involves the exchange of electrons
Alex17521 [72]

Answer:

Ionic or Electrovalent Bonding

Explanation:

There are primarily two categories of bonding between chemical entities. We have; Ionic Bonding and Covalent Bonding.

Ionic bonding or electrovalent bonding is the complete transfer of valence electron(s) between atoms. There is the transfer of electron from typically a metal to a non metal.

Covalent Bonding however involves the sharing of electrons between atoms. Depending on whuch atoms provide the electrons, it can be ordinary covalent oor coordinate covelent bond.

5 0
3 years ago
Draw the major organic product for the reaction of 1-phenylpropan-1-one with the provided phosphonium ylide.
prohojiy [21]

Answer:

2-methylene propylbenzene

Explanation:

The Wittig Reaction is a reaction that converts aldehydes and ketones into alkenes through reaction with a phosphorus ylide.

The ketone in this case is 1-phenylpropan-1-one. The provided phosphonium ylide is shown in the image attached. The reaction involves;

i) alkylation  

ii) addition

The product of the major organic product of the reaction is 2-methylene propylbenzene.

4 0
3 years ago
Why does a permeable rock weather chemically at a fast rate?
ki77a [65]
<span>Water soaks into it easily and during freeze-thaw cycles would be more likely to break apart because of the water freezing and thawing inside the rock. The water freezes and expands inside the rock, causing the surface to break off in flakes from the pressure of the expanding ice inside.</span>
3 0
4 years ago
An aqueous solution has a normal boiling point of 103.0°
torisob [31]
About 5 degrees  that is

3 0
3 years ago
Watch the following videos on molecule mixing encapsulators:
qwelly [4]

Answer:

here you go

Explanation:

                                                                     

6 0
2 years ago
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